chore(Brewfile): Prune is now part of cleanup

Author: Christian Trabold

bootstrap.sh

@@ -34,7 +34,7 @@ if [[ $OSTYPE == darwin* ]]; then
     brew bundle
 
     echo "Cleanup 'homebrew'"
-    brew prune && brew cleanup && brew tap --repair
+    brew cleanup && brew tap --repair
     brew install dockutil
     echo "Cleanup dock"
     dockutil --remove all